Accurate taxi time prediction is required for enabling efficient runway scheduling that can increase runway throughput and reduce taxi times and fuel consumptions on the airport surface. Currently NASA and American Airlines are jointly developing a decision-support tool called Spot and Runway Departure Advisor (SARDA) that assists airport ramp controllers to make gate pushback decisions and imp...

In this paper, we propose a general model for on-demand air taxi services for a single service provider which unifies the previous research in this area. We then apply this model to the analysis of the week-to-week resource utilization of an air taxi service network. Towards that end, we develop two representations of the general air taxi service model to study several weekly utilization metric...

This study investigated differences in risk-perception among U.S., Spanish, West German, and Brazilian drivers. Subjects estimated the risk involved in slide-projected traffic scenes. The scenes, photographed in the United States and Spain, were rated for the amount of risk by using a seven-point scale. The subject groups in each country included younger, middle-aged, and older nonprofessional ...

Quality is a difficult concept to describe and there is no clear definition. People have different views of what quality means and describe it in different ways. Take the example of a trip by taxi. How would you describe the quality of the trip? Do you base your description on the politeness of the driver or the luxury of the vehicle? Or was it that you arrived at your destination safely? If yo...

Computer technology has dramatically enhanced our ability to generate, deliver, and store information. Unfortunately, our tools for locating, ltering, and analyzing information have not kept pace. A popular solution is intelligent agents. But what are they? We provide a survey showing the myriad ways in which the evocative term \agent" is interpreted by researchers in the eld. Following the \In...

Polycyclic aromatic hydrocarbons (PAH) are common air pollutants generated from incomplete combustion. The inhalation of exhaust fumes in urban areas has been suggested to be an additional contributing factor. This study investigated the influence of urban traffic exposure, personal lifestyle factors and metabolic enzyme polymorphisms on the urinary 1-hydroxypyrene (1-OHP) level, approximating ...

In view of the ever-increasing air traffic, much attention in air traffic management research has been given to improving arrival and departure efficiency. As air traffic begins and ends at the airport, the issues of taxi delays and ground incursions are becoming more evident. This paper considers the surface-traffic problem at major airports and envisions a collaborative traffic and aircraft c...

Whenever traffic density becomes so critically high that it begins to jeopardize efficiency and safety, the answer lies in the ability to improve traffic coordination and movement precision. This study considers the surface-traffic problem at major airports, and establishes the possibility of highprecision taxi operations by applying state-of-the-art automatic control technologies. Due to the h...

The paper presents research on large-scale microscopic simulation of taxi services in Berlin and Barcelona based on floating car data collected by local taxi fleets. Firstly, Berlin’s and Barcelona’s taxi markets are shortly described and the demand and supply data obtained from FCD analysed. Secondly, the online taxi dispatching problem formulation for this specific case is given, followed by ...

Andrographolide (Andro) has emerged recently as a potential and effective anticancer agent with induction of apoptosis in some cancer cell lines while induction of G2/M arrest with weak apoptosis in others. Few studies have proved that Andro is also effective in combination therapy. The flavonoid Taxifolin (Taxi) has showed anti-oxidant and antiproliferative effects against different cancer cel...